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Catalogs Discussion Forums -> Differential Calculus -> domain -> Go to message
This Post 0 points    (Olaaa!! Perrrfect answer.   in 0 votes )   [?]
11 replies   
i cant believe no one else has got the correct answer... people value of pi is 3.14
and @johrianshuman ur intersection is totally wrong
Catalogs Discussion Forums -> Differential Calculus -> domain -> Go to message
This Post 0 points    (Olaaa!! Perrrfect answer.   in 0 votes )   [?]
11 replies   
Ans) xE [0,4]


x^2>=16
x E [-4,4]

sinx >=0... thus x is 0 to pi, 2pi tp 3pi, 4pi to 5pi....
x E [ 2 n pi , (2n+1) pi ]

intersection of the two is x E [0,pi]


*PLZ RATE* n joy u too
Catalogs Discussion Forums -> Algebra -> Find all values of n, for which n, 4n2 +1, 6n2 +1 are all prime numbers? -> Go to message
This Post 20 points    (Olaaa!! Perrrfect answer.   in 4 votes )   [?]
13 replies   
units place of squares of all numbers end in one out of
0,1,4,9,6,5

for n to be a prime number , it cant have 0, 2, 4, 6, 8, 5 in units place ( except for n = 2 and 5)
thus its square cant end with 0, 4, 6, or 5 (except for n = 2.. as 2 is the only even prime number and n = 5 as mentioned in previous line)

thus we are left with 1 and 9 .. n square can only end with 1 and 9
and when we have this condition we see that for any such value of n we always have one composite number (non prime) out of 4n^2 + 1 and 6n^2 + 1
because with last digit as 1, 4n^2 + 1 will have 5 as units place
and with last digit as 9, 4n^2 + 1 will have 5 in units place

thus we are only left with n = 2 and n = 5.

but at n = 2 , 6n^2 + 1 becomes 25 which is not prime
thus the only solution is n = 5

*PLZ RATE*
Catalogs Discussion Forums -> Algebra -> Find all values of n, for which n, 4n2 +1, 6n2 +1 are all prime numbers? -> Go to message
This Post 0 points    (Olaaa!! Perrrfect answer.   in 0 votes )   [?]
13 replies   
prime number is odd?!!!! who u kidding man

n = 2 is even n prime
Catalogs Discussion Forums -> Differential Calculus -> limit urgent -> Go to message
This Post 0 points    (Olaaa!! Perrrfect answer.   in 0 votes )   [?]
7 replies   
x/ y is generally the representation of a fraction ,,,
fraction raised to power decreases as the power increases
1/2 1/4 1/16 etc.

so limit x/y to power n n tending to infinity will be 0
Community shelf Community shelf -> A Mathematical Comedy -> Go to message
This Post 0 points    (Olaaa!! Perrrfect answer.   in 0 votes )   [?]
11 replies   
(4 - 9/2 )sq = ( 5 - 9/2 )sq
u dont solve this equation by jus takin sq root u have to bring terms to one side to form asquare - bsquare type of equation
and u get 5 - 9/2 = 9/2 - 4
which is true as 9/2 is 4.5 and it lies between 4 and 5
Catalogs Discussion Forums -> Mechanics -> If a body moves 6Km. south &4Km. west -> Go to message
This Post 0 points    (Olaaa!! Perrrfect answer.   in 0 votes )   [?]
7 replies   
root of ( (2root3) sq + 2 sq )
= root 12
or 2root3
Catalogs Discussion Forums -> Organic Chemistry -> instant trick required -> Go to message
This Post 0 points    (Olaaa!! Perrrfect answer.   in 0 votes )   [?]
7 replies   
either alkene forms when elimination takes place CH3 CH = CH CH3
or when substitution SN2 occurs CH3CH-OH CH2CH3
Catalogs Discussion Forums -> Organic Chemistry -> EASY ONE -> Go to message
This Post 0 points    (Olaaa!! Perrrfect answer.   in 0 votes )   [?]
5 replies   
exactly:)
Catalogs Discussion Forums -> Algebra -> polynomial eqns. -> Go to message
This Post 2 points    (Olaaa!! Perrrfect answer.   in 1 votes )   [?]
3 replies   
arre this is simple taara :)
if x = a is a root then (x-a) is a factor of the polynomial.. and since it is m times thus it is (x-a)^m is a factor of the polynomial

and thus F(X) (of degree n ) = (x-a)^m (g(x))
where g(x) is of power( n - m) because total degree of equation in left and right must be same which is n


*PLZ RATE* :)
Catalogs Discussion Forums -> Trignometry -> awesome -> Go to message
This Post 5 points    (Olaaa!! Perrrfect answer.   in 1 votes )   [?]
3 replies   
no... x^2 - y^2 = a^2 + b^2

by solving the two ( square both equations and add)
we finally get
(a^2 + b^2)sec^2 @ = (x^2 - y^2)sec^2 @ + 2y^2
thus for @to be eliminated the sec terms' coefficients must be same and thus we get the answer as
x^2 - y^2 = a^2 + b^2


*PLZ RATE*
Catalogs Discussion Forums -> Organic Chemistry -> instant trick required -> Go to message
This Post 0 points    (Olaaa!! Perrrfect answer.   in 0 votes )   [?]
7 replies   
i think alkene forms CH3 CH = CH CH3
Catalogs Discussion Forums -> Organic Chemistry -> EASY ONE -> Go to message
This Post 0 points    (Olaaa!! Perrrfect answer.   in 0 votes )   [?]
5 replies   
yes CH3CH2OH undergoes mild oxidation during the process to form CH3CHO which has CH3C=O linkage and hence gives positive iodoform test
Catalogs Discussion Forums -> Differential Calculus -> limits conceptual doubt1 -> Go to message
This Post 0 points    (Olaaa!! Perrrfect answer.   in 0 votes )   [?]
19 replies   
see it this way
inf + 2 is also equal t o infinity

so infinity - infinity can be written as infinity - ( infinity + 2)

so it will be - 2 ... it can be any number this way.. got it ? :)
Catalogs Discussion Forums -> Differential Calculus -> limits conceptual doubt1 -> Go to message
This Post 0 points    (Olaaa!! Perrrfect answer.   in 0 votes )   [?]
19 replies   
neeral is correct and also infinity - infinity is not zero because we dont know the exact value of infinity... its just a concept of mathematics... infinty is a whole big branch of maths in itself its not just any simple number..
 
 
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